A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

Where Cusack's record store from the film "High Fidelity" was located.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

Internationally known record store and purveyor of "dusties."

The approximate spot where the last Grand Master of the Knights Templar was put to death.

The narrowest street in Paris.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A modern-day Lascaux cave underneath Paris.

This massive library holds what was once the largest book collection in the world.

These fantastically named natural pools look like something out of a Scottish myth.

This banal Parisian entranceway is not what it seems.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The first green space constructed on an elevated viaduct.

Statue of death tucked in the University of Medicine courtyard.

Indents in the pavement are all that remain from a grisly death machine in Paris.

The oldest stone house in Paris was built by its most famous alchemist.